Other realizations of the International Terrestrial Reference System (ITRS)
According to the new structure of IERS implemented in 2001 three ITRS Combination Centres are responsible for the computation of ITRS realizations. After a validation procedure, one realization is defined to be the official ITRF solution.
To the ITRF2008, IGN and DGFI contributed by computing ITRS realizations. To the ITRF2014, IGN, DGFI and JPL contributed. The realizations computed at IGN were selected to be provided as ITRF2008 and ITRF2014.
ITRS Combination Centre at Deutsches Geodätisches Forschungsinstitut (DGFI)
See also IERS Message No. 311